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authorBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-14 21:19:04 +0300
committerBartlomiej Zolnierkiewicz <bzolnier@gmail.com>2009-01-14 21:19:04 +0300
commit2ea5521022ac8f4f528dcbae02668e02a3501a5a (patch)
tree6eeb0b6dcff046966130ac5faf0f424bfd62067c /drivers
parenta294d97742568f429590cf2022d92e4b0c5f6ba0 (diff)
downloadlinux-2ea5521022ac8f4f528dcbae02668e02a3501a5a.tar.xz
ide: fix suspend regression
On Monday 12 January 2009, Simon Holm Thøgersen wrote: > commit 295f000 ("ide: don't execute the next queued command from the > hard-IRQ context (v2)") breaks suspend to disk for me. On > 'echo disk > /sys/power/state' the systems hangs, letting me switch > virtual consoles, but not responding to Alt+SysRq Restart the request queue early for REQ_TYPE_PM_RESUME requests (though there is only one resume request for the whole resume sequence it stays in the queue until is fully completed and now depends on kblockd for processing consequential resume states). Reported-and-bisected-by: Simon Holm Thøgersen <odie@cs.aau.dk> Tested-by: Simon Holm Thøgersen <odie@cs.aau.dk> Signed-off-by: Bartlomiej Zolnierkiewicz <bzolnier@gmail.com>
Diffstat (limited to 'drivers')
-rw-r--r--drivers/ide/ide-pm.c12
1 files changed, 8 insertions, 4 deletions
diff --git a/drivers/ide/ide-pm.c b/drivers/ide/ide-pm.c
index 4b3bf6a06b70..60538d9c84ee 100644
--- a/drivers/ide/ide-pm.c
+++ b/drivers/ide/ide-pm.c
@@ -186,12 +186,10 @@ void ide_complete_pm_request(ide_drive_t *drive, struct request *rq)
blk_pm_suspend_request(rq) ? "suspend" : "resume");
#endif
spin_lock_irqsave(q->queue_lock, flags);
- if (blk_pm_suspend_request(rq)) {
+ if (blk_pm_suspend_request(rq))
blk_stop_queue(q);
- } else {
+ else
drive->dev_flags &= ~IDE_DFLAG_BLOCKED;
- blk_start_queue(q);
- }
spin_unlock_irqrestore(q->queue_lock, flags);
drive->hwif->rq = NULL;
@@ -219,6 +217,8 @@ void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
* point.
*/
ide_hwif_t *hwif = drive->hwif;
+ struct request_queue *q = drive->queue;
+ unsigned long flags;
int rc;
#ifdef DEBUG_PM
printk("%s: Wakeup request inited, waiting for !BSY...\n", drive->name);
@@ -231,5 +231,9 @@ void ide_check_pm_state(ide_drive_t *drive, struct request *rq)
rc = ide_wait_not_busy(hwif, 100000);
if (rc)
printk(KERN_WARNING "%s: drive not ready on wakeup\n", drive->name);
+
+ spin_lock_irqsave(q->queue_lock, flags);
+ blk_start_queue(q);
+ spin_unlock_irqrestore(q->queue_lock, flags);
}
}